EP 0293196 A3 19900131 - SYSTEM FOR CONTROLLING THE PRESSURE OF OIL FOR A CONTINUOUSLY VARIABLE TRANSMISSION
Title (en)
SYSTEM FOR CONTROLLING THE PRESSURE OF OIL FOR A CONTINUOUSLY VARIABLE TRANSMISSION
Publication
Application
Priority
JP 13446387 A 19870528
Abstract (en)
[origin: EP0293196A2] A continuously variable transmission has a torque converter (14) with a lockup clutch (19). A high pressure oil pump (70) is provided adjacent the transmission and a low pressure oil pump (72) is provided adjacent the torque converter. A line pressure control valve (100) is provided for controlling the pressure of oil supplied from the high pressure oil pump (70) to produce a line pressure for operating the transmission. A lockup control valve (170) operated by low pressure oil supplied from the low pressure oil pump (72) is provided for controlling the lockup clutch, and a solenoid operated valve (179) is provided to generate a converter condition pressure for operating the lockup control valve and thereby operating the lockup clutch. The converter condition pressure is applied to the line pressure control valve (100) to increase the line pressure.
IPC 1-7
IPC 8 full level
F16H 47/00 (2006.01); F16H 47/06 (2006.01); F16H 61/00 (2006.01); F16H 61/14 (2006.01); F16H 61/662 (2006.01)
CPC (source: EP US)
F16H 61/0021 (2013.01 - EP US); F16H 61/14 (2013.01 - EP US); F16H 61/66259 (2013.01 - EP US); F16H 2061/6608 (2013.01 - EP US); Y10T 74/19153 (2015.01 - EP US)
Citation (search report)
- [XE] EP 0293195 A2 19881130 - FUJI HEAVY IND LTD [JP]
- [A] EP 0196807 A1 19861008 - BORG WARNER AUTOMOTIVE [US]
Designated contracting state (EPC)
DE GB IT NL
DOCDB simple family (publication)
EP 0293196 A2 19881130; EP 0293196 A3 19900131; JP S63297863 A 19881205; US 4846765 A 19890711
DOCDB simple family (application)
EP 88304769 A 19880526; JP 13446387 A 19870528; US 19839288 A 19880524